RETROZONE SD 10 inch DAMPER
Manufactured by RetroZone Inc, this Super Duty 10  inch round Damper is a commercial grade round damper at a price that competes with residential grade dampers.
We can sell this damper at this price because we are the manufacturer, there is NO MIDDLEMAN on this product! The quality of material is the best available and is backed up by a 5 year – Best In Industry Warranty. The industry leading Belimo LM24-3-T Power Open / Power Close 3 wire motor that drives this damper has 45 in-lb’s of torque which is twice the amount of strength found in dampers similarly or even higher priced, yet uses far  less power than spring return dampers.  RetroZone sells this damper to A/C contractors and wholesalers all around the U.S. We will sell it directly to you in our Dampers Direct EBAY store.
FEATURES INCLUDE:
24vac  powered and works with almost all zone control systems and thermostats, no matter what brand, with technical support by phone or email, and an industry leading 5 year warranty.
Precision open and close motor adjustments allow fine tuning or air flow.
Can be modulated, damper blade will not move when de-powered.
Heavy duty galvanized metal can.
Hardware with Bronze Bushings, not plastic.
Belimo LM24-3-T Brushless 3 wire Power Open / Power Close Motor
Very efficient: one 40va 24volt AC damper powers 20 or more dampers
Reinforcing Beads for Super Duty Strength
Durozone commercial 1/2 inch drive hardware
Blades bolted on-not cheap spot welding!
Full Durozone duct rated blade seals for almost 0% leakage.
Uses only 2va of power for 90 seconds opening and closing time, compared to 8 to 10 va continuous power on spring return dampers.
De-Clutch button on face of motor allows easy rotation of blade for testing.
Reversing switch on motor  changes blade direction
Direct drive quality, no cheap gears and springs on this damper.
Works great with any brand zone control system or thermostat.
Can handle commercial system air pressures of 2 inches or more.
5 year warranty.
Due to the low sales volume on these 3″ and 4″ sheet-metal dampers, a slightly different
damper can
may be used
than the one pictured.  This damper will still feature a Belimo LMB24 motor
FREE SHIPPING BY UPS GROUND TO THE CONTINENTAL US ONLY.
Power use: The Belimo LMB 3 wire, power open-power close  motor uses only 2 va of power, and only when in motion. Compare that to spring return motors that use a constant 8 to 10va when energized, and get too hot to even  touch.  The quality is beyond comparison to spring return dampers.  One 40va 24vac transformer can power 20 or more SD dampers (compare to three or four spring return dampers).  How? The industry renowned Belimo LMB motor uses power only when in motion,  not continously, like a spring return, and never gets warm to the touch.
Works great on zone control systems or direct thermostat control, works great with almost any thermostat (see our damperdirect store for thermostats.)
This is the
highest quality
, most versatile damper on ebay.  Even as a 3 wire damper,  the versatile Belimo motor with 5 year warranty features a “one wire trigger” to work from a simple switch or thermostat, no relays needed.  How?  24vac power is wired to terminals 1 and 2, and then switched power from a thermostat or  switch  to terminal 3 causes the damper to close.  Remove power from terminal 3 and damper opens, its that easy. Request a “slave zone” diagram when ordering if connecting directly to a thermostat.